Campagnolo record 11speed rear derailleur redesigned for 2015 offering significant performance enhancements the new external pieces allow the rear derailleur to move at a different angle and the internal design pulls the chain closer to the cassette this means there is better power transfer better chaincassette interface and a longer life for the consumable components upper to lower pulley axle 55 mm composite outer plate ultra light 2 part hanger bolt parallelogram with 11x geometry carbon f